The Mirt Traffic Light and Signal Control Device

How It Works

The MIRT is perfect for under cover police use.

No visible light is emitted! That means that through the exclusive use of Infrared Transmission you will completely blend in with all other traffic, yet be able to safely control intersections!

Unique Advantages:

  • Small unit 5” wide x 1 3/4” high x 2” Deep (front glass lens to back of reflector)
  • Mounts on dash, visor, under bumper, top of bumper, in most factory fog light cut outs, on roof, in the light bar, on roll bar, even on you motorcycle!!!
  • Electronics box can be mounted in engine compartment, under dash, in the trunk if you need the extra room, even on the engine protection bars of your motorcycle!
  • Comes complete with the strobe head (with Infrared Lens), Electronics box 4 ¾” x 4 ¾” x 2 ¼” with mounting ears, wiring harness, and switch.
  • Infrared light source, no visible flashing light.
  • Perfect for under cover detective applications.
  • Installs in less than a hour.
  • High quality electronics, perfect for heavy usage.
  • High signal light output! Trigger traffic light change from more than 3500 feet!
  • The most affordable waterproof Emitter on the market!
  • Less than half of the cost of competing products!
  • Manufactured by a trusted name in the industry, with 15+ years experience in electronics!
  • Explanation of Traffic Signal Preemption

The normal operation of any traffic signal controlled intersection is designed for the maximum and efficient throughput of vehicular traffic.

Unfortunately, a common occurrence at any intersection is traffic back-up, which can require many signaling cycles to clear. Without the ability to change the operation of the traffic signals themselves, police and emergency response vehicles can also be forced to sit in traffic, thus dramatically increasing their response times to crime scenes and fire or medical emergencies.

Furthermore, even without heavy traffic, a police or emergency response vehicle entering a traffic signal controlled intersection at a high rate of speed places all motorists (and sometimes pedestrians) at extreme risk.

Traffic signal preemption is an optical communications system that allows preemption-equipped vehicles to alter the normal operation of preemption-equipped traffic signals.

An overview of a typical scenario is as follows:

  1. A fire truck is dispatched to an emergency.
  2. The fire truck is equipped with multiple emergency warning lights and a siren… The fire truck is also equipped with a preemption transmitter, which, in operation, is a high intensity forward-facing strobe light that is flashing at a rapid rate - much faster than normal attention-getting lights on the fire truck.
  3. When the fire truck approaches within 1,800 feet (line-of-sight) of a preemption-equipped traffic signal controlled intersection, the preemption detector (normally mounted on the cross-arm that suspends the traffic signal) "sees" the fire truck’s preemption transmitter and locks onto its flashing strobe.
  4. Once the traffic signal "sees" the fire truck, it begins to initiate a "preemption sequence" of the actual traffic signal that is different from normal operation.
  5. If the fire truck already has a green light, the light will remain green. Any other direction that also has a green light (usually the opposite direction) will first get a yellow light, then red.
  6. When all of the other directions are then red, and the fire truck’s direction is the only one that is green, the left turn arrow will illuminate (if one exists), and a brilliant white flood lamp mounted near the traffic signal will begin to flash. This flood lamp tells the driver of the fire truck that he now has control of the intersection, and complete right-of-way.
  7. If the fire truck has a red light, any other direction that has a green light will transition to yellow, then red. When all the directions (including the fire truck’s) are red, the traffic signal facing the fire truck will then turn green, along with the left turn arrow (if one exists), and the brilliant white flood lamp will begin to flash.
  8. Once the fire truck has passed through the intersection, optical communication with the preemption detector (on the traffic signal) is lost. At that time the traffic signal will default back to normal operation. Conversely, until the fire truck passes through the intersection, it will have a green light, regardless of the time duration.
  9. If several intersections are within the 1,800 foot range of the fire truck’s preemption transmitter, they will all respond accordingly to the above operational description.